syzkaller login: [ 31.221507] BUG: Bad rss-counter state mm:00000000d241fced type:MM_FILEPAGES val:33 [ 31.222991] BUG: Bad rss-counter state mm:00000000d241fced type:MM_ANONPAGES val:22 [ 31.392805] ================================================================== [ 31.393720] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.394647] Read of size 8 at addr ffff888019d316b0 by task sshd/220 [ 31.395541] [ 31.395760] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.396623] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.397608] Call Trace: [ 31.397930] [ 31.398214] dump_stack_lvl+0x91/0xf0 [ 31.398705] print_report+0xcc/0x620 [ 31.399192] ? __virt_addr_valid+0x102/0x340 [ 31.399746] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.400356] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.400978] kasan_report+0xbe/0xf0 [ 31.401452] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.402088] vma_interval_tree_remove+0xc75/0xec0 [ 31.402695] vma_prepare+0xc54/0x11a0 [ 31.403195] __split_vma+0x5af/0x950 [ 31.403670] ? __pfx___split_vma+0x10/0x10 [ 31.404196] ? find_held_lock+0x2c/0x110 [ 31.404718] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.405283] ? lock_is_held_type+0x9f/0x120 [ 31.405826] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.406429] ? mtree_range_walk+0x632/0x900 [ 31.406977] ? mas_walk+0x5c7/0x7c0 [ 31.407466] do_vmi_munmap+0x1f1/0x2b0 [ 31.407956] mmap_region+0x1f9/0x2660 [ 31.408439] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.408952] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.409665] ? __pfx_lock_acquire+0x10/0x10 [ 31.410196] ? __pfx_mmap_region+0x10/0x10 [ 31.410726] ? security_mmap_addr+0x7d/0xa0 [ 31.411261] ? get_unmapped_area+0x1f5/0x3f0 [ 31.411809] do_mmap+0x854/0xf00 [ 31.412249] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.412744] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.413308] ksys_mmap_pgoff+0x3af/0x500 [ 31.413821] do_syscall_64+0x3f/0x90 [ 31.414297] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.414954] RIP: 0033:0x7fe6e788ed82 [ 31.415434] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.417555] RSP: 002b:00007ffef72f2fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.418459] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe6e788ed82 [ 31.419316] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe6e6cc8000 [ 31.420158] RBP: 00007fe6e6cc8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.421004] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f39c06ec0 [ 31.421852] R13: 00007ffef72f2fc0 R14: 00007ffef72f2ff0 R15: 00007ffef72f3350 [ 31.422701] [ 31.422990] [ 31.423209] Allocated by task 213: [ 31.423635] kasan_save_stack+0x22/0x50 [ 31.424133] kasan_set_track+0x25/0x30 [ 31.424622] __kasan_slab_alloc+0x59/0x70 [ 31.425145] kmem_cache_alloc+0x16b/0x370 [ 31.425657] vm_area_dup+0x20/0x160 [ 31.426111] __split_vma+0x170/0x950 [ 31.426573] split_vma+0xc6/0x110 [ 31.427012] mprotect_fixup+0x8d2/0xb30 [ 31.427536] do_mprotect_pkey+0x87e/0xd40 [ 31.428054] __x64_sys_mprotect+0x78/0xc0 [ 31.428572] do_syscall_64+0x3f/0x90 [ 31.429043] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.429683] [ 31.429898] Freed by task 213: [ 31.430287] kasan_save_stack+0x22/0x50 [ 31.430786] kasan_set_track+0x25/0x30 [ 31.431291] kasan_save_free_info+0x2b/0x50 [ 31.431819] __kasan_slab_free+0x10a/0x190 [ 31.432349] kmem_cache_free+0x10d/0x4d0 [ 31.432852] rcu_core+0x8c8/0x2860 [ 31.433293] __do_softirq+0x1b7/0x7d4 [ 31.433763] [ 31.433981] Last potentially related work creation: [ 31.434566] kasan_save_stack+0x22/0x50 [ 31.435067] __kasan_record_aux_stack+0x8e/0xa0 [ 31.435658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.436299] remove_vma+0x139/0x170 [ 31.436750] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.437307] do_vmi_munmap+0x1f1/0x2b0 [ 31.437794] __vm_munmap+0x138/0x3a0 [ 31.438261] __x64_sys_munmap+0x59/0x80 [ 31.438758] do_syscall_64+0x3f/0x90 [ 31.439234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.439871] [ 31.440087] The buggy address belongs to the object at ffff888019d31658 [ 31.440087] which belongs to the cache vm_area_struct of size 168 [ 31.441551] The buggy address is located 88 bytes inside of [ 31.441551] freed 168-byte region [ffff888019d31658, ffff888019d31700) [ 31.442947] [ 31.443165] The buggy address belongs to the physical page: [ 31.443820] page:00000000f17575da refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d31 [ 31.444897] memcg:ffff88800fd6b701 [ 31.445322] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.445966] page_type: 0xffffffff() [ 31.446419] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.447361] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd6b701 [ 31.448275] page dumped because: kasan: bad access detected [ 31.448940] [ 31.449156] Memory state around the buggy address: [ 31.449737] ffff888019d31580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.450594] ffff888019d31600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.451464] >ffff888019d31680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.452310] ^ [ 31.452890] ffff888019d31700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.453746] ffff888019d31780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.454603] ================================================================== [ 31.455721] Disabling lock debugging due to kernel taint [ 33.408395] BUG: Bad rss-counter state mm:000000000fc9012c type:MM_FILEPAGES val:33 [ 33.409532] BUG: Bad rss-counter state mm:000000000fc9012c type:MM_ANONPAGES val:22 [ 33.872657] BUG: Bad rss-counter state mm:00000000c4d0ef02 type:MM_FILEPAGES val:33 [ 33.873741] BUG: Bad rss-counter state mm:00000000c4d0ef02 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62785' (ECDSA) to the list of known hosts. 2023/06/20 04:16:32 fuzzer started 2023/06/20 04:16:32 dialing manager at localhost:44161 2023/06/20 04:16:32 checking machine... 2023/06/20 04:16:32 checking revisions... [ 34.630564] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:16:32 testing simple program... [ 34.686799] cgroup: Unknown subsys name 'net' [ 34.741205] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:16:30 Registers: info registers vcpu 0 RAX=ffff888019318000 RBX=ffff88801931f680 RCX=ffff88801931f688 RDX=ffff888019320000 RSI=ffff88801931f5b8 RDI=ffff88801931f5f8 RBP=dffffc0000000000 RSP=ffff88801931f598 R8 =0000000000000001 R9 =ffff88801931f628 R10=0000000000038001 R11=0000000000006097 R12=ffffed1003263ebf R13=ffffed1003263ebe R14=ffff88801931f630 R15=ffff88801931f5e8 RIP=ffffffff81132fd4 RFL=00000216 [----AP-] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f43a304a900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007f43a35ff650 CR3=000000000cfec000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00005640ee87b000 CR3=00000000096ea000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=2031333a36313a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a36313a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000